DE1214918B - Printing device for recording media - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN ÄWflwS PATENT OFFICE

EDITORIAL

Int. α .:

Number:
File number:
Registration date:
Display day:

G06k

German KX: 43 a -41/03

1214 918
J24903IXc / 43a
December 11, 1963
April 21, 1966

As output units for data processing machines there are numerous types of printing units and -devices known, in which it is particularly important, the highest possible printing speeds to achieve the usually higher processing speed of the connected To be able to use systems and, ideally, even to reach them.

Among these known pressure devices there are also those in which the impact energy is not generated mechanically or electromagnetically, but by the spark discharge between two electrodes, due to the pressure waves of high mechanical and thermal energy develop. This type of energy generation works very quickly and is therefore for the said Particularly suitable for use.

When the impact energy generated by spark discharge is used to accelerate a Type carrier or to move a recording medium against a type but could have the advantages this method cannot be fully exploited because of the inertia of the masses to be accelerated the achievable working speed reduced and in this case only indirect use of the Pressure energy unavoidable losses occurred.

There are therefore devices known in which by spark discharge between electrodes resulting energy is used directly. Such known arrangements are used for mar- 3 <> marking of a recording medium with machine-scannable characters by using the printing energy Punch or embossing points are generated in coded form on the recording medium, whereby in some cases, z. B. for embossing, the generated thermal energy can also be used.

The invention is now based on the object of a printing device which is improved in comparison to create, by means of which with direct utilization of the spark discharge Impact energy can be printed on a recording medium in legible plain text. The invention is characterized in that the pressure waves generated by the ignition of electrodes receiving space through a mask-like design, the characters to be printed in plain text Representative openings containing matrix is completed, behind which a pressure-sensitive recording medium is performed on an abutment.

The operation of the printing device according to the invention enables a practically inertia Printing with full utilization of that for the printing device for recording media

Applicant:

International Business Machines Corporation,

Armonk, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. H. E. Böhmer, patent attorney,

Böblingen (Württ.), Sindelfinger Str. 49

Named as inventor:

Bernard Jerome Greenblott,

Robert John Hart, Binghamton, N.Y. (V. St. A.)

Claimed priority:
V. St. v. America December 24, 1962
(246 721)

Spark discharge technically achievable speed. If there is a sparkover between the electrodes are essentially closed within the compressible volume of gas Space pressure waves and a momentary plasmatic state are generated, which are at atmospheric Propagate pressure and normal temperature at supersonic speed. Shock waves and plasma pass through the openings of the die and produce a sharp image on the recording medium Image of the character represented by the openings. By means of the printing device according to the invention can due to the high, practically loss-free available pressure energy without several copies can also be made at the same time.

According to an advantageous embodiment of the invention, the electrodes are in an electrode carrier plate made of insulating material and is the one that receives the electrode gap Outside formed as a surface reflecting the pressure waves.

Furthermore, a passage can be made in a cover plate placed on the electrode carrier plate form the space receiving the pressure waves.

609 559/204

3 4

In a further development of the inventive concept, the device for generating a spark

it is considered to be particularly expedient to discharge the through-discharge through the gap 16 of the electrodes 14 and

gear in the cover plate to the die to convert 15 consists of a storage capacitor 17, the

Yawing conically shaped and on the one hand via the line 19, an ignition switch

In other words, the 5 18 representing the characters and the line 20 with the electrode 14 and

Openings in the die to the recording medium on the other hand via the line 21 to the electrode 15

to converge towards conical shape. connected is. After charging the capacitor 17

According to a particular embodiment according to the switch 18 is closed and triggers one

of the invention, the proposed pressure rollover over the gap 16, whereby in the

facility as a line printing unit, io adjoining gas space shock waves and a momentary

wherein the matrix develops in a manner known per se as a tan plasma state and from the surface

endless belt is formed and at least one 10 a are reflected.

complete set of characters to be printed

holds. Preferably the figure containing the characters is running. 1, a battery 22 as an electric power source

Band provided via an electric motor drive 15, which via lines 23 and 24 and a

around, with the aid of known electrical control charging switch 25 with one side of the

ments each at the time the spark capacitor 17 and over the line 26 with the

discharge of the individual pressure points is triggered, the other capacitor side is connected. With open

to which the desired print mark is on the netem ignition switch 18 is therefore when closing

relevant pressure point is located. 20 of the charge switch 25, the battery 22 with the

Connected by the printing device according to the invention capacitor 17 and causes its Aufist a very high printing speed can be achieved, charge. After the charging process, the because neither the recording medium switch 25 is opened for printing and the locking device is not open for unloading a type carrier or a type accelerates switch 18 closed. The actuation of this switch and have to be moved against another part. 25 ter for charging and discharging the capacitor The release of the imprint of one and the same point can also be done automatically instead of by hand can be carried out extremely quickly in succession using known control elements. and the available pressure energy is so high that the condenser 17 is preferably not used as energy just a sharp imprint but also a storage capacitor with low internal inductance Considerable number of copies designed as punch through 30 and low internal resistance. Opti-manufacturable are. For the latter purpose, either male results were obtained with about 0.5 μΡ a pressure-sensitive recording medium using capacitance for generating a discharge voltage Find application or, according to a further invention of 5 to 7 kV at the gap 16 with a gap width between Feature, normal writing paper with see 0.8 and 3.8 mm.

upstream pressure-sensitive color paper, which contains 35 As can be seen from FIGS. 1 and 4

if necessary also as a set of several sheets, the arrangement continues to be a focusing

with colored papers in between. plate effective cover plate 30 with a conical

The invention is explained in more detail below; shaped passage 31. The most beneficial out

the drawings show partially schematic Dar- a formable plastic material, eg. B. a Positions of the structure of the printing device according to 40 acrylic resin plastic, such as polyacrylic ester, made

of the invention, partially possible execution cover plate 30 with the passage 31 lies on the

to shape. In detail, surface 10 shows α of the electrode carrier plate 10, so that

Fig. 1 is a sectional view of a unit of sparking the passage 31 a gas-filled space directly

discharge pressure device including the zu- bar above the gap 16 forms. A die plate 32 corresponding circuit, 45 (Fig. 1, 2, 4) with a symbol representing a certain

FIG. 2 shows a plan view of a die according to the setting pattern in the form of openings 33 in FIG

the application in the example according to FIG. 1 with the plate is placed over the cover plate 30 that the

Letter U, openings 33 with the top surface of the passage

F i g. 3 is a perspective view of the electrodes 31 aligned. The die plate 32 is made support plate 50, preferably made of brass, the openings 33 are

F i g. 4 a partially exploded view ground in. To record a character

the arrangement according to FIG. 1, a pressure-sensitive recording medium 34 is used for clarification

of the workflow and or behind a pressure-sensitive color paper

F i g. Fig. 5 is a schematic perspective view 36 of sheet of paper 35 lying on top of this Line printing unit as an application example of the 55 voltage carrier is a cover plate 37 (Fig. 1, 4).

printing device according to the invention. Screws 38 hold the whole arrangement together.

According to FIG. 1 contains the spark discharge men; They protrude through bores in the matrix device an electrode carrier plate 10, the middle plate 32, in the cover plate 30 and in the Elektels retaining brackets 12 and screws 13 on an electrode carrier plate 10 and are fastened in the threaded base plate 11. The plate 10 consists of 60 holes 10 b (Fig. 3) screwed into the plate 10, made of electrically insulating material and is designed as a plastic block with regard to the formation of the openings 33, for example. Two of the die plate 32 are particularly good results. Electrodes 14 and 15 can be achieved in the plate 10 if, as in FIG. 1 and 4 is shown, arranged that between them on the upper surface also the openings 33 have a conical cross section 10 a of the plate 10 a gap 16 as a spark gap 65 and, according to the arrangement of the cover plate. The electrodes 14 and 15 consist, for example, 30, with the tapering towards the recording medium, of lines embedded in the plate 10, so that strips made of tungsten converge from the gap 16. Lead channels to the recording medium.

The working process will now be described in more detail with reference to the illustration according to FIG. The cover plate 30 rests against the electrode carrier plate 10, followed by the die plate 32, behind it the recording medium 34 and the cover plate 37. A capacitor discharge triggers a sparkover at the electrodes 14,15 and causes in the passage 31 shows the generation of a shock wave 40 and a plasmatic state. Shock wave 40 and plasma are reflected from the surface 40 a of the plate 10 and flow from the passage 31 to this facing surface of the die plate 32. Parts of the shock wave and the plasma then pass through the Openings 33 and in this way form a shape corresponding to the shape of the openings 33, such as represented by dashes 41 and 42 (Fig. 4). This shock wave and plasma pattern is therefore represented by the Die plate 32 guided against the recording medium 34 and produces the impression. With perfect With a flat cover plate 37, the imprint corresponds with good accuracy to that represented by the openings 33 Sign.

In Fig. 4, a part of the individual components is shown exploded to show the shock wave propagation make clear. The strongly drawn out shock wave lines such. B. 43, set There are peaks in the shock waves as they occur when an undamped capacitor discharge circuit is used according to FIG. 1 is known to occur.

F i g. 5 shows the application of the arrangement according to FIG. 1 in a printing device with each an entire line is printed. A pressure-sensitive recording medium in the form of a continuous paper web 50 is guided over a platen 51, and on the Front is an electrode support unit 52 with a number of equidistant from each other arranged in a row along a print line arranged pairs of electrodes. Every pressure point is associated with a spark generating device, consisting of two electrodes 53 and 54 with the cover plate 55 with the passage 56. The die part is as an endless belt 57 with a number mask-shaped openings 58 representing the characters and on two rollers 59 and 60 out, of which the former is mounted on a drive shaft 61.

Via the drive shaft 61, the belt 57 moves at a uniform speed at the passages 56 of the cover plate 55 passed, and the electrodes of the individual pressure points are each ignited at the moment of passage of the corresponding openings, as it was in a similar manner in the control of known chain printing works is going on. The paper web 50 is after each Line print advanced by the required line spacing.

Claims (8)

Patent claims: 1. Printing device for recording media, with a spark discharge device for generation the impression energy, characterized in that the pressure waves generated by the ignition of electrodes (14, 15; 53, 54) receiving space. (31; 56) by a mask-like design, the character to be printed Die (32; 57) containing openings (33; 58) in plain text are closed behind which a pressure-sensitive recording medium (34; 50) on an abutment (37; 51) is performed. 2. Printing device according to claim 1, characterized in that the electrodes (14, 15; 53, 54) are embedded in an electrode carrier plate (10; 52) made of insulating material, the the electrode gap (16) receiving outside as the pressure wave reflecting surface (10 a) is formed. 3. Printing device according to claims 1 and 2, characterized in that a passage (31; 56) in a cover plate (30; 55) placed on the electrode carrier plate (10; 52) forms the space receiving the pressure waves. 4. Printing device according to claim 3, characterized in that the passage (31; 56) in the cover plate (30; 55) has a convergent shape converging towards the die (32; 57). 5. Device according to claims 1 to 4, characterized in that the the characters Representative openings (33; 58) in the die (32; 57) towards the recording medium (34; 50) are converging conically shaped. 6. Printing device according to claims 1 to 5, characterized in that the die is designed in a manner known per se as an endless belt (57) and at least one complete Set of characters to be printed. 7. Printing device according to claim 6, characterized in that the containing the characters continuous belt (57) in a manner known per se via a motor drive (59, 61) is driven in rotation. 8. Printing device according to claim 1, characterized in that the recording medium (34; 50) neutral paper (35) with overlying pressure-sensitive color paper (36) is used will. Considered publications:
U.S. Patent No. 2,737,882. 1 sheet of drawings 609 559/204 4.66 © Bundesdruckerei Berlin